Display device and driving method thereof

Abstract

A driving method is applied to a display device including a display panel, a backlight module, and a processing circuit. The processing circuit is coupled to the display panel and the backlight module. The driving method includes the following steps of when the image is a still image, enabling the processing circuit to control the display panel to display the image during a first frame time, and to control the backlight module to blink in accordance with a first driving frequency during the first frame time.

What is claimed is: 
     
         1 . A driving method applied to a display device, which comprises a display panel, a backlight module and a processing circuit coupling to the display panel and the backlight module, the driving method comprising a step of:
 when the image is a still image, enabling the processing circuit to control the display panel to display the image during a first frame time, and to control the backlight module to blink in accordance with a first driving frequency during the first frame time.   
     
     
         2 . The driving method of  claim 1 , further comprising a step of:
 when the image is not a still image, enabling the processing circuit to control the display panel to display the image during a second frame time, wherein the second frame time is shorter than the first frame time.   
     
     
         3 . The driving method of  claim 1 , further comprising a step of:
 when the image is not a still image, enabling the processing circuit to control the backlight module to blink in accordance with a second driving frequency during a second frame time or to keep turning on during the second frame time, wherein the second driving frequency is less than or equal to the first driving frequency.   
     
     
         4 . The driving method of  claim 1 , further comprising a step of:
 enabling the processing circuit to control the backlight module to blink in accordance with the first driving frequency during a part of the first frame time and then to control the backlight module to keep turning on.   
     
     
         5 . The driving method of  claim 4 , wherein the backlight module has a first brightness as the backlight module blinks, and the backlight module has a second brightness as the backlight module keeps turning on. 
     
     
         6 . The driving method of  claim 2 , wherein the first frame time corresponds to a first refresh rate being smaller than 60 Hz, and the second frame time corresponds to a second refresh rate being greater than or equal to 60 Hz. 
     
     
         7 . The driving method of  claim 6 , wherein the display panel has a plurality of liquid crystal cells, and a polarity change rate of the liquid crystal cells is smaller than or equal to the first refresh rate. 
     
     
         8 . The driving method of  claim 1 , wherein the first frame time includes an image writing period and a waiting period, and the image writing period is in front of the waiting period. 
     
     
         9 . The driving method of  claim 8 , wherein the backlight module blinks in accordance with the first driving frequency during the image writing period, and keeps turning on during the waiting period until the end of the first frame time. 
     
     
         10 . A display device, comprising:
 a display panel;   a backlight module disposed opposite to the display panel; and   a processing circuit coupling to the display panel and the backlight module;   wherein, when the image is a still image, the processing circuit controls the display panel to display the image during a first frame time, and controls the backlight module to blink in accordance with a first driving frequency during the first frame time.   
     
     
         11 . The display device of  claim 10 , wherein when the image is not a still image, the processing circuit controls the display panel to display the image during a second frame time, and the second frame time is shorter than the first frame time. 
     
     
         12 . The display device of  claim 10 , wherein when the image is not a still image, the processing circuit controls the backlight module to blink in accordance with a second driving frequency during a second frame time or to keep turning on during the second frame time, and the second driving frequency is less than or equal to the first driving frequency. 
     
     
         13 . The display device of  claim 10 , wherein the processing circuit controls the backlight module to blink in accordance with the first driving frequency during a part of the first frame time and then controls the backlight module to keep turning on. 
     
     
         14 . The display device of  claim 13 , wherein the backlight module has a first brightness as the backlight module blinks, and the backlight module has a second brightness as the backlight module keeps turning on. 
     
     
         15 . The display device of  claim 11 , wherein the first frame time corresponds to a first refresh rate being smaller than 60 Hz, and the second frame time corresponds to a second refresh rate being greater than or equal to 60 Hz. 
     
     
         16 . The display device of  claim 15 , wherein the display panel has a plurality of liquid crystal cells, and a polarity change rate of the liquid crystal cells is smaller than or equal to the first refresh rate. 
     
     
         17 . The display device of  claim 10 , wherein the first frame time includes an image writing period and a waiting period, and the image writing period is in front of the waiting period. 
     
     
         18 . The display device of  claim 17 , wherein the backlight module blinks in accordance with the first driving frequency during the image writing period, and keeps turning on during the waiting period until the end of the first frame time.